:root {
    --primary: var(--primary-color, #111111);
    --primary-hover: #000000;
    --card-bg: var(--card-bg, #ffffff);
    --text-main: var(--text-color, #222222);
    --text-muted: #666666;
    --border-color: var(--border-color, #e0e0e0);
    --radius: var(--card-radius, 0px);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body, input, select, textarea, button {
    font-family: var(--font-body, 'Inter', 'Noto Sans SC', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif);
}

body {
    background: var(--bg-color, #ffffff);
    color: var(--text-main);
    line-height: 1.8;
    min-height: 100vh;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: all 0.3s ease;
}

a:hover {
    color: var(--primary-hover);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Sharp Card Styles */
.card {
    background: var(--card-bg);
    border-radius: var(--radius);
    margin-bottom: 30px;
    border: 2px solid #111111;
    padding: 24px;
}

.btn.card {
    padding: 8px 16px;
    margin-bottom: 0;
    display: inline-block;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    width: 100%;
    min-height: var(--header-height, 80px);
    display: flex;
    align-items: center;
    background: var(--card-bg);
    border-bottom: 2px solid var(--primary);
    margin-bottom: 40px;
}

.main-wrapper {
    margin-top: 40px;
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
    max-width: 1250px; /* Slightly wider than the 1200px .container */
    margin: 0 auto;
    padding: 0 30px;
}

.site-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: #1e293b;
    letter-spacing: 0.5px;
    z-index: 101;
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-main);
    cursor: pointer;
    z-index: 101;
}

.site-nav {
    display: flex;
    gap: 25px;
    align-items: center;
}

.site-nav a {
    font-weight: 600;
    color: var(--text-muted);
    font-size: 0.95rem;
}

.site-nav a:hover {
    color: var(--primary);
}

/* Hero Section */
.hero-section {
    padding: 60px 40px;
    text-align: center;
    margin-bottom: 40px;
    position: relative;
    overflow: hidden;
}

.hero-section::before {
    display: none;
}

.hero-title {
    font-size: 2.8rem;
    font-weight: 800;
    color: var(--text-main);
    margin-bottom: 15px;
    line-height: 1.2;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 600px;
    margin: 0 auto 25px;
}

.hitokoto-box {
    display: inline-block;
    padding: 8px 20px;
    background: #f8f9fa;
    border-radius: var(--radius);
    font-size: 0.9rem;
    color: var(--text-muted);
    border: 1px solid var(--border-color);
}

/* Layout Grid */
.layout-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 30px;
}

@media (min-width: 768px) {
    .layout-grid {
        grid-template-columns: 2.5fr 1fr;
    }
}

/* Post List */
.post-list {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.post-card-inner {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.post-card-content {
    flex: 1;
    min-width: 0;
}

.post-card-cover {
    flex-shrink: 0;
    width: 180px;
    height: 130px;
    border-radius: 6px;
    overflow: hidden;
}

.post-card-cover img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.3s ease;
    display: block;
}

.post-card-cover img:hover {
    transform: scale(1.05);
}

@media (max-width: 768px) {
    .post-card-inner {
        flex-direction: column-reverse;
    }
    .post-card-cover {
        width: 100%;
        height: 180px;
    }
}

.post-card {
    transition: border-color 0.3s ease;
}

.post-card:hover {
    border-color: var(--primary);
}

.post-title {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.post-title a {
    color: #1e293b;
}

.post-title a:hover {
    color: var(--primary);
}

.post-meta {
    font-size: 0.85rem;
    color: #828a99;
    margin-bottom: 15px;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
}

.post-meta > span {
    display: inline-flex;
    align-items: center;
}

.post-meta > span:not(:last-child)::after {
    content: "|";
    margin: 0 12px;
    color: #d1d5db;
    font-weight: 400;
}

.post-excerpt {
    color: #475569;
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.read-more {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--primary);
    text-decoration: none;
    transition: color 0.2s ease;
    display: inline-block;
}

.read-more:hover {
    color: var(--primary-hover);
    text-decoration: underline;
}

/* Sidebar */
.sidebar {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.widget {
    /* inherits border & padding from .card */
}

.widget-title {
    font-size: 1.1rem;
    margin-bottom: 15px;
    color: #0f172a;
    display: flex;
    align-items: center;
    gap: 8px;
}

.widget-title::before {
    content: '';
    display: block;
    width: 4px;
    height: 16px;
    background: var(--primary);
    border-radius: 2px;
}

/* Author Profile */
.author-profile {
    text-align: center;
}

.author-avatar {
    width: 100px;
    height: 100px;
    border-radius: var(--radius);
    margin-bottom: 15px;
    object-fit: cover;
}

.author-name {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
    padding-bottom: 10px;
    border-bottom: 1px dashed var(--border-color);
}

.author-bio {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Post Detail */
.post-detail, .page-detail {
    padding: 40px;
}

.post-detail .post-title, .page-detail .page-title {
    font-size: 2.2rem;
    text-align: center;
    margin-bottom: 20px;
    border-bottom: 2px solid #111111;
    padding-bottom: 15px;
}

.post-detail .post-meta {
    justify-content: center;
    margin-bottom: 40px;
}

.post-content h1, .post-content h2, .post-content h3,
.page-content h1, .page-content h2, .page-content h3 {
    margin: 30px 0 15px;
    color: #0f172a;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
}

.post-content p, .page-content p {
    margin-bottom: 15px;
    font-size: 1.05rem;
}

.post-cover-img {
    max-width: 100%;
    max-height: 350px;
    width: 100%;
    object-fit: cover;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.1);
    display: block;
    margin: 0 auto;
}

.post-content img, .page-content img {
    max-width: 100%;
    max-height: 500px;
    height: auto;
    object-fit: contain;
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0,0,0,0.05);
    margin: 20px auto;
    display: block;
}

/* Footer */
.site-footer {
    text-align: center;
    padding: 30px 0;
    margin-top: 50px;
    color: var(--text-muted);
    font-size: 0.9rem;
    border-top: 1px solid rgba(255,255,255,0.4);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .menu-toggle {
        display: block;
    }

    .site-nav {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(255, 255, 255, 0.95);
        backdrop-filter: blur(20px);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 10px 20px rgba(0,0,0,0.05);
    }

    .site-nav.active {
        display: flex;
    }

    .hero-section {
        padding: 30px 20px;
    }

    .hero-title {
        font-size: 1.8rem;
    }
    
    .card {
        padding: 15px;
    }

    .post-title {
        font-size: 1.25rem;
    }

    .post-detail h1.post-title,
    .page-detail h1.page-title {
        font-size: 1.6rem;
    }
}

/* Default Theme Tag Style (Black Square Border) */
.default-tag {
    display: inline-block;
    background: transparent !important;
    padding: 4px 10px !important;
    border: 1px solid #000 !important;
    border-radius: 0 !important;
    font-size: 0.85rem;
    margin-right: 8px;
    margin-bottom: 8px;
    color: #000 !important;
    text-decoration: none;
    transition: all 0.2s ease;
}

.default-tag:hover {
    background: #000 !important;
    color: #fff !important;
}

/* Layout Left Sidebar mode */
@media (min-width: 768px) {
    .layout-grid.layout-left-sidebar {
        grid-template-columns: 1fr 2.5fr;
    }
}